ImageMagick

Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.

Your command should not work. You are trying to change all colors by using -fuzz 100% and your are trying to change white, not black to red. This works fine for me on IM 7.0.8.23 Q16 Mac OSX Sierra, thought I get pure red and not your lighter reddish color.

One more query, I am trying to combine three commands in one to achieve drop shadow effect in image. Below command used to work in orlder version but not working in current version. Can you please correct me where I am doing wrong? Below is the command.

-respect-parentheses apparently was not converted to IM 7. Use -respect-parenthesis. Also you need to add a null: after your last parenthesis. So in Windows IM 7 with ^ as new line characters to make it more readable, try